Synthesis of Tetragonal Phase LiYF<sub>4</sub>: Yb and Tm Microcrystals with Strong UV Upconversion Fluorescence

<div>Energy transfer process of Yb<sup>3+</sup> ions and Tm<sup>3+</sup> ions and upconversion emission mechanisms.</div>

Journal of Nanomaterials

Figure 5: Synthesis of Tetragonal Phase LiYF<sub>4</sub>: Yb and Tm Microcrystals with Strong UV Upconversion Fluorescence 